crot.f (3) - Linux Man Pages
subroutine crot (integerN, complex, dimension( * )CX, integerINCX, complex, dimension( * )CY, integerINCY, realC, complexS)
CROT applies a plane rotation with real cosine and complex sine to a pair of complex vectors.
CROT applies a plane rotation, where the cos (C) is real and the sin (S) is complex, and the vectors CX and CY are complex.
N is INTEGER The number of elements in the vectors CX and CY.
CX is COMPLEX array, dimension (N) On input, the vector X. On output, CX is overwritten with C*X + S*Y.
INCX is INTEGER The increment between successive values of CY. INCX <> 0.
CY is COMPLEX array, dimension (N) On input, the vector Y. On output, CY is overwritten with -CONJG(S)*X + C*Y.
INCY is INTEGER The increment between successive values of CY. INCX <> 0.
C is REAL
S is COMPLEX C and S define a rotation [ C S ] [ -conjg(S) C ] where C*C + S*CONJG(S) = 1.0.
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
- September 2012
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